Rod-packhtg



P. J. NAWN.

ROD PACKING.

APPLICATION FILED 1AN.20. 1919.

1 ,320,567.. Patented Nov. 4, 1919.

WITNESS.

E E??? J/Vzzwz BOD-PACKING.

Specification of Letters Patent.

Patented Nov. 4t, 1919.

Application filed January 20, 1919. Serial No. 272,162.

a citi- Mil- ' waukee, in the county of Milwaukee and State of Visconsin, have invented a new and useful Improvement in Rod-Packing, which is fully disclosed in the accompanying drawing and described in the attached specifica tion.

My invention is an improvement on the arrangement disclosed in Patent No. 419,069 granted to one W. S. Rhodes and is intended to obviate the defects which use, age and time have p'roven are detrimental to a more eifie cie-nt method of rod packing and the sealing of bores through which pass cylindrically shaped reciprocating elements that require packing to guard against-the escape of gases or fluids and the like, employed in generating power, or in transporting products as in pumping; also in providing a design of metal elements calculated to offer a minimum of wear resulting from the friction encountered and to provide a sealing means that is designed to adjust itself readily to the changing conditions, caused by said wear, by virtue of an arrangement by which the several parts employed may contract as a ring-formed body about the said reciprocating elements; also furnishing a means whereby these advantages can be attained by a construction of metal parts requiring a lesser amount of said metal for their manufacture in arriving at a design which will embody the functions aforesaid.

I obtain these objects by a construction herein shown on the aforesaid drawing, in which:

Figure 1 is a sectional view through a stuffing-box showing application of my arrangement;

Fig. 2, a detached broken assembly of the segment-formed metal rings;

Fig. 3, a section on line 3-3 of Fig. 4:, and Fig. t is an enlarged fragmentary view of the rod packing.

Similar characters and figures of reference apply to like parts throughout the several views.

A piston rod R adapted to reciprocate in a stufiingbox B is enveloped in a packing contained within the said stuffing box by a gland member G, which assembly forms the usual method of packing, applicable to various kinds of mechanical combinations reing space quiring the particular manner of sealing herein referred to.

The aforesaid packing, consisting of metal rings formed by the segments 1, whose crosssection approximates a quarter circle, having their flat vertical faces opposed to like surfaces of a similar assembly with the joints between the segments 1, of said opposed assemblies, staggered as shown. Each segment 1 has formed in its convex surface the valley or depression 2 and each segment is connected to another by means of a soft wire clip 3 which serves to maintain the ring form of the united segments; said rings being capable of adaption to cylinder rods, etc., by cutting one clip, the remaining two clips being suflicientto retain the assembly in proper relation when-combined on said rods. The segments are divided by a parttangentiallydisposed to the rods and leaves the faces 4r-4= inclined the radial lines of a circle having the periphery aforesaid. Formed as grooves, or recesses, 5 in the faces i are the means whereby I provide the allowance required for the buckling of the aforesaid wire 3, whose distorted form is shown dotted in Fig. 4, when the segment-formed rings aforesaid are forced to contract through wear and the pressure exerted by the resilient elements 6, whose tendency is to compel the aforesaid rings to hug the cylindrical sur face of the rod R and assist in forcing the segments 1 to coincide with the shape of the said rod B through the inward radial pressure exerted, as before stated, by the said resilient elements 6.

The pressure, keeping the segments '1 in contact with the reciprocating member R, will, if the spaces between the segments 1 be radial, as indicated by the radial pressure arrow P, Fig. 4:, allow sufiicient resilient body to enter the spaces and form a key against a further approach toward each other of the segments 1, thus keeping apart the metal members and destroying the seal intended by being thus held against contraction. This effect is aggravated by the wire tie connecting the segments 1 if there is not provided space enough for said wire to buckle whereby the bent wire aids in obstructing the said contraction in the metal rings aforesaid.

My tangental joint avoids this, as is clearly shown in 4 and the provision periphery as regards f ing the former objection against the afore-' 7 said metal rlngs contraction.

'employed,=of rounding the outer cornersof the tangental faces 4, aids the segmentsto wedge under the resilient rings 6 more readily; also by virtue of the means afforded, whereby'the Wire clips 3 may fold or buckle themselves in the spaces 5, thereby eliminat- The depressions 2 are designed to allow the resilient means 6 to swell therein, fur-' nishing a twofold function; that of holding the segments Im a staggered relationship, as regards their tangental joints, and the pressure increase by virtue ofgreater volume of said resilient member being allowed 7 to pressradially inward, and peripherally toward the said joints, alding, in this manner, the more effective sealing about the rod R, and economically reducing the cost of manufacturing 7 the essential part of the aforesaid invention.

7 vPatent,is: r 55 copies of this patent may be obtained for ments, joints aforesaid being A packing, composed of metallic rings formed with segments having flexibleconnections, said rings having recessed diagonal of said flexible connections; r o I i3. In a packing, a metallic ring formed of segmental units, said units having ends or faces tangent to a circle ofnoticeably'less faces adapted to receive the distorted form diameter thantheinner curvature of the me' tallic ring aforesaid and rounded outer C01? ners of said ends or faces. V I

4. A packing, ametallic ring'composed of segmental units in paired sets having de-c pressions, resilient means adapted'to engage said depressionsto maintain the'said units 7 5. A packing, means of the kind described having metallic rings of paired assembly formed of flexibly connected segments with diagonal joints between each'of said segof increased area about the flexibleconnections. w

6. A packing, metallic annular assemblies in a determined relationship to each other.:

having resilient means "surrounding" and spacing sa1d assemblies laterally, said assemblies provided With concave depressions formed in the convex surfaces of the said me- 7 tallic annular assemblies.

' PHIL J. NAWiI.

five cents each, by addressing the f Commissioner of Patents, Washington, D. 0. V 

